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Direct injection cross point switching for multiplexing control in an engine control system

a cross-point switching and control system technology, applied in the direction of electric control, fuel injection control, machines/engines, etc., can solve the problem of increasing the complexity of the controller (ecu), and achieve the effect of more flexibility

Active Publication Date: 2017-07-11
NATIONAL INSTRUMENTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent is about improving engine controllers for passenger cars and industrial engines. It proposes an engine control module (ECM) that can control advanced diesel engines with new-concept injectors. The ECM is designed for research and low-volume production, with more flexibility than typical engine controllers in production vehicles. The patent also suggests a standalone direct injector driver module (SDIDM) which includes the power electronics of the ECM but lacks some of the engine's input / output features. This allows for more flexibility and research on new technologies.

Problems solved by technology

The number of actuators to control, and the complexity of the controller (ECU) increased with each round of regulation, as the automotive electronics industry matured.

Method used

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  • Direct injection cross point switching for multiplexing control in an engine control system
  • Direct injection cross point switching for multiplexing control in an engine control system
  • Direct injection cross point switching for multiplexing control in an engine control system

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Embodiment Construction

[0034]FIG. 1 shows a schematic diagram of one embodiment of a diesel engine system that includes an engine control unit (ECU) 202 with a subset of the input-output (I / O) used on ECU 202. Fresh air enters through pipe 240 in the direction shown, while the exhaust leaves via pipe 242 through catalyst (CAT) 230. Pressure and temperature are sampled before the compressor (COM) 226 / 228 in region (1). Air is compressed by the compressor 228 / 226 in region (C), where it may be gated by a throttle 222. The air is then mixed with a recirculated portion of the exhaust gas (EGR)—which is gated by throttle 220—in the intake manifold (IR) 218, where the pressure and temperature may be sampled as well. The mix of EGR and fresh air is then conveyed to the engine combustion chamber 214. Diesel fuel is pumped from the fuel tank 210 in to the common rail (CR) fuel system 208, from where it is provided to the injectors 230. At the correct engine angle, the fuel injectors 230 are fired by energizing a s...

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Abstract

An engine system may include a injectors, and an engine control unit (ECU) having a number of pins coupling to the injectors. The ECU may include an individual measurement circuit coupled to each pin, with each individual measurement circuit providing a respective individual output corresponding to the pin coupled to the measurement circuit. The ECU may also include subtraction circuits, each subtraction circuit having a respective pair of inputs and providing an output representative of a difference between respective input values appearing at the pair of inputs. The ECU may also include cross-point switches coupled between the measurement circuits and the subtraction circuits, and may determine the voltage difference between any two pins by selectively coupling the respective output of each of the two individual measurement circuits coupled to the two pins to a respective input of the pair of inputs of any subtraction circuit.

Description

PRIORITY CLAIM[0001]This application claims benefit of priority of U.S. provisional application Ser. No. 61 / 720,031 titled “Direct Injection Cross Point Switching for Multiplexing Control in an Engine Control System”, which was filed on Oct. 30, 2012, and which is hereby incorporated by reference in its entirety as though fully and completely set forth herein.BACKGROUND OF THE INVENTION[0002]Field of the Invention[0003]This invention relates generally to engine controllers and, more particularly, to direct injection cross-point switching for multiplexing in an engine control system.[0004]Description of the Related Art[0005]Most present day internal combustion engines, or other type of automotive or general-purpose engines are controlled using engine control units (ECUs). Typically, an ECU is an electronic, oftentimes computerized or computer-directed control unit operated to read feedback values from a number of sensors situated within and around the engine (e.g. in the engine bay f...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): F02D41/20F02D41/26F02D41/28
CPCF02D41/20F02D41/266F02D41/28F02D2041/2051
Inventor VIELE, MATTHEW
Owner NATIONAL INSTRUMENTS